Sea Water Pump Mechanical Shaft Seal Kit – Fits Volvo Engines & Jabsco Pumps (Replaces 96080-0080, 818864)

$46.00

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Product Details

This Sea Water Pump Mechanical Shaft Seal Kit is a direct-fit replacement for various Volvo marine engines equipped with Jabsco raw water pumps. It is specifically designed for compatibility with pump models in the 11850, 11860, 17100, 18830, 18840, 18930, and 18940 series, ensuring a precise fit for restoring pump integrity.

This component provides a direct interchange for Jabsco part 96080-0080, Volvo part 818864, and Northern Lights part 25-12066.

Engineered as a direct replacement that requires pump disassembly for installation.
Features a copper spring design to maintain consistent pressure and prevent leaks.
Restores a proper seal to prevent water from entering the pump's bearing housing.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Jabsco	96080-0080
Volvo	818864
Northern Lights	25-12066

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This seal fits a range of Volvo marine engines that utilize specific Jabsco raw water pump series.

Brand	Model	OEM Part No.	Notes
Volvo	Pumps 11850-SERIES	818864	Used with Jabsco raw water pumps
Volvo	Pumps 11860-SERIES	818864	Used with Jabsco raw water pumps
Volvo	Pumps 17100-SERIES	818864	Used with Jabsco raw water pumps
Volvo	Pumps 18830-SERIES	818864	Used with Jabsco raw water pumps
Volvo	Pumps 18840-SERIES	818864	Used with Jabsco raw water pumps
Volvo	Pumps 18930-SERIES	818864	Used with Jabsco raw water pumps
Volvo	Pumps 18940-SERIES	818864	Used with Jabsco raw water pumps
Northern Lights	Compatible Pumps	25-12066

Technical Specs

Product Type: Mechanical Shaft Seal Kit
Installation: Direct replacement, requires pump disassembly
Fitting Type: Mechanical Shaft Seal
Warranty: 1 Year
Other Technical Attributes: Includes copper spring design, replaces worn seals to prevent water leakage

What’s in the Box

1 x Mechanical Shaft Seal Kit (96080-0080/818864/25-12066)

Installation Notes

Before starting, disconnect the vessel's battery and close the raw water intake seacock.
Remove the sea water pump from the engine, taking care to label hoses if necessary.
Disassemble the pump housing to gain access to the impeller and underlying shaft seal.
Carefully remove the old, worn shaft seal, avoiding scratches to the housing surfaces.
Clean the seal cavity thoroughly, ensuring it is free of debris and corrosion.
Press the new mechanical seal into place. Crucially, ensure the "open side" with the visible copper spring faces toward the impeller.
Reassemble the pump, including the cover and a new gasket if required.
Reinstall the pump onto the engine, tighten all mounting bolts, and reconnect the hoses.
Open the seacock, reconnect the battery, and start the engine to check for any leaks around the pump body.

Troubleshooting & FAQ

How do I know if my shaft seal is failing?

The most common sign of a failing shaft seal is water leaking or dripping from the weep hole on the sea water pump body. You may also notice rust trails originating from the pump or hear a grinding noise, which could indicate the bearings are failing due to water ingress.

What is the correct way to install this seal?

Proper orientation is critical for a long service life. The mechanical seal has two sides: a ceramic or carbon-faced side and an open side with a visible copper spring. The open, spring-loaded side must face the impeller (the "wet" side) to ensure correct pressure against the shaft.

How often should this seal be replaced?

Replacement interval depends on usage, water conditions (salt vs. fresh), and hours run. It is good practice to inspect the seal for leaks at every service interval and replace it whenever the impeller is changed or at the first sign of a leak.

Will this fit my specific Volvo Penta engine model?

This seal is designed for the Jabsco pump series listed in the compatibility table, which are used on many Volvo engines. The best way to confirm fitment is to verify the part number on your existing pump or seal and match it to the cross-references provided (Jabsco 96080-0080, Volvo 818864).

What causes a shaft seal to fail prematurely?

Common causes include running the pump dry (which overheats the seal faces), abrasive particles in the raw water (silt, sand), improper installation, or shaft wear. Always ensure water is present before running the engine.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost?

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns?

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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